Hi Frank, The semantic of osd_snap_trim_sleep was copied from osd_delete_sleep.
The general setting "osd_snap_trim_sleep" is used only to override the _hdd _hybrid _ssd tuned values. Here's the code to get the effective sleep value: if (osd_snap_trim_sleep > 0) return osd_snap_trim_sleep; if (!store_is_rotational && !journal_is_rotational) return osd_snap_trim_sleep_ssd if (store_is_rotational && !journal_is_rotational) return osd_snap_trim_sleep_hybrid return osd_snap_trim_sleep_hdd Do you think the doc needs to be updated? Cheers, Dan On Thu, Feb 24, 2022 at 12:27 PM Frank Schilder <fr...@dtu.dk> wrote: > > I seem to have the opposite problem with fs snaptrim progress as others > recently. I would like to speed it up. I looked at the docs and find the > description of osd_snap_trim_sleep* > (https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_snap_trim_sleep) > counter-intuitive and confusing. > > For osd_snap_trim_sleep it says "This option overrides backend specific > variants.", which is exactly the opposite of how other options are applied, > for example, the osd_memory_target family of options. The usual way is that > more specific options (back-end specific) supersede less specific options > (general defaults). What is correct? Is the overall default sleep=0 for all > types of OSDs, or is it 5s(=osd_snap_trim_sleep_hdd) for HDDs? > > If the documentation is wrong, please correct. > > Thanks and best regards, > ================= > Frank Schilder > AIT Risø Campus > Bygning 109, rum S14 > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io